JP2832046B2 - Turret punch press - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a turret punch press for punching a work.

(Prior Art) In a conventional turret punch press, a single servomotor drives an upper and lower turret integrally, and a station is provided with a pair of punches and a die, and a vertical movement of the punch relative to the die is performed. The workpiece is subjected to punching (punching). In this case, the processing conditions such as the plate thickness are determined and set by the operator.

For this reason, whenever the clearance between the punch and the die is changed depending on the plate thickness, material, etc., the die must be replaced each time, or another punch having the same shape must be prepared, and a die with a different clearance must be used. It was configured to perform press working by arranging it in a station. That is, the punch and the die constitute one tool as a pair.

(Problem to be Solved by the Invention) In the work of preparing and selecting a pair of punches and dies and performing punching, it takes time to perform a selection operation for determining a clearance between the punch and the die or an attachment / detachment operation. However, the work efficiency cannot be improved, and automation by the numerical controller tends to be limited.

(Means for Solving the Problems) The present invention has been made in view of the problems as described above,
The invention according to claim 1 is directed to an upper turret in which a punch is disposed, a lower turret in which dies having the same shape as the punch and different clearances are disposed, and the upper turret according to a material and a plate thickness of a work to be processed. A control device for selecting a turret, a punch arranged in the lower turret, a punch having an optimum clearance from the die, and a die, and the upper turret for turning and indexing the punch and the die selected by the control device to a punching processing position; Each driving device for independently driving the lower turret, wherein the position of the axis of the upper turret and the axis of the lower turret are shifted to open an upper position of a part of the upper surface of the lower turret. It becomes as.

According to a second aspect of the present invention, in the first aspect of the present invention, there is provided a work clamp having a plate thickness sensor for detecting a plate thickness of the work.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Referring to FIG. 1 and FIG. 2, the turret punch press 1 is constituted by a portal frame in which a processing interval portion 7 is formed between the lower frame 3 and the upper frame 5, and has a substantially rectangular shape in a front view. ing. In the machining interval 7, work tables 11 and 13 on which a free bearing 9 is disposed are provided on the upper side of the lower frame 3 on which a workpiece W as a workpiece is placed so as to be movable in a horizontal direction. In addition, the work W placed on the work tables 11 and 13
The work clamp 15 is moved by clamping, and FIG. 3 (A), as shown (B), the punch P stamping the workpiece W, Q, an upper turret 17 arranged R, die P ₁ ~ P ₃ , Q ₁ ~ Q ₃ , R ₁ ~ R ₃ etc.
Are provided at the processing interval 7. Numeral 21 is a numerical control device as a control device provided on one side of the turret punch press 1.

A carriage base 25 is guided on the work table 13 by a rail 23 provided on the lower frame 3 in the Y-axis direction (the left-right direction in FIGS. 1 and 2).
And a carriage movably guided with respect to the carriage base 25 in the X-axis direction (the vertical direction in FIG. 2).
27 are provided. The plurality of work clamps 15 provided on the carriage 27 hold the edge of the work W from above and below, and the numerical control device 21 controls the movement of the work W to a predetermined set position. The work table 11 is a fixed table fixed to the lower frame 3 at the center in the X-axis direction, whereas the work table 13 is located before and after the fixed table, and has one side end at the carriage base. 25 is a moving table that moves in the Y-axis direction as a unit.

Upper turret 17 is attached to the lower end of the turret shaft 29 depending from the upper frame 5, by a servo motor M ₁ provided on one side of the upper frame 5, the speed reducer
It is configured to transmit and rotate via a drive chain 33, a drive sprocket 35 and the like. In such an upper turret 17,
As shown in FIG. 3 (A), punches P, Q, R, which are dies of different sizes or shapes, are arranged on the same diameter centering on the turret shaft 29.

A striker 39 is provided at the press center at the upper position of the rotation trajectory of each of the punches P, Q, and R by hydraulic pressure, a crank or a cam 37, etc., and the vertical movement of the striker 39 causes the upper turret 17 to move upward and downward. Punch P, Q
Or R is downed.

Opposite to the outer periphery of the upper turret 17, there is provided a shot pin cylinder 41 which is operated in accordance with a certain timing phase in conjunction with the drive chain 33, and the shot pin cylinder 41 is provided with a shot pin cylinder 41. Upon receiving the engagement by the pin, the upper turret 17 is controlled to stop turning at a predetermined position.

On the other hand, the lower turret 19 is
A turret shaft 43 is provided at a position deviated to the left on the line in the Y-axis direction with respect to the lower frame 3, and is provided so as to be pivotable on the lower frame 3. The upper surface of this lower turret 19
The work table 11 and 13 are provided on substantially the same plane, and can pass through a processed portion of the work W moved by the work clamp 15. The lower turret 19 is driven by a servomotor M ₂ provided at one end of the lower frame 3.
It is configured to be driven and rotated via a speed reducer 45, a drive chain 47, a drive sprocket 49 and the like.

By displacing the turret shaft 43 of the lower turret 19 with respect to the turret shaft 29 of the upper turret 17, FIGS.
As shown in FIG. 2, the upper turret 1
The position of 7 is shifted so that the upper space of a part of the upper surface of the lower turret 19 is opened.

As shown in FIG. 3 (B), the lower turret 19 has dies P facing the respective punches P, Q, R of the upper turret 17 on the same diameter centered on the turret shaft 43. ₁ ~P _3, Q
_{1 to} Q ₃ , R _{1 to} R _3, etc. are arranged. These dies P _{1 to} P
₃ forms a predetermined clearance between mating surfaces for punching with respect to the punch P, and this clearance is, for example, a workpiece W to be processed such as P ₁ <P ₂ <P _3. Is set so as to provide an optimum clearance for each plate thickness. The punch Q and the dies Q _{1 to} Q ₃ and the punch R and the dies R _{1 to} R ₃ are similarly configured.

In addition, the lower turret 19 pivots around the turret axis 43 so that the dies P _{1 to} P ₃ , Q _{1 to} Q ₃ , and R _{1 to} R ₃
Each punch P, Q, R of the upper turret 17 and both turret shafts 43, 29
On a straight line which is a location where the punching center of (stamping position) T connecting the upper and lower the polymerization match, the punch P by the striker 39, Q, when R is driven, the lower die P ₁ to P _3, Q ₁ is to Q ₃ or fit implantation in any of such R ₁ to R ₃ together.

Further, a shot pin cylinder 51 which is actuated under a certain timing phase by the drive chain 47 is provided to face the outer periphery of the lower turret 19, and a shot pin provided on the shot pin cylinder 51 is used. Upon receiving the engagement, the lower turret 19 is controlled to stop turning at a predetermined position.

In FIG. 4, a plate thickness sensor 53 for detecting a plate thickness is provided, for example, on the work clamp 15.
Is the thickness of the work W when the work W is held, and the thickness of the work W is detected and input to the numerical controller 21. The work clamp 15 clamps the work W from above and below by a lower receiving piece 55 and an upper holding piece 57. The receiving piece 55 has a base mounted on the carriage 27, and the holding piece 57 has the receiving piece 55. Are provided so as to be rotatable by a clamp shaft 59.

A clamp cylinder 61 is provided at the base of the presser piece 57 by hydraulic expansion and contraction. By the operation of the clamp cylinder 61, the presser piece 57 is pinched and rotated about the clamp piece 59 with respect to the receiving piece 55. Has become. Due to the extension of the clamp cylinder 61, the tip end of the holding piece 57 pivotally approaches the upper surface of the lower receiving piece 55, and clamps the workpiece W supplied between the receiving piece 55 and the holding piece 57. In addition, it is configured to operate in the opposite manner to hold and release.

The plate thickness sensor 53 is provided as a stroke sensor in the clamp cylinder 61, detects the clamping thickness of the clamp cylinder 61 when the work clamp 15 clamps the work W, and inputs and transmits the detection as the plate thickness detection. 63 is work W
Is a stopper for determining the holding position in the Y-axis direction.

In Figure 1, 65 denotes a signal line of the servomotor M _1, 67 is its power line. 69 denotes a signal line of the servomotor M _2, 71 is its power line. Reference numeral 73 denotes a signal line of the plate thickness sensor 53. These signal lines 65, 69, 73 and power lines 67, 71 etc.
It is connected to the numerical controller 21 so as to control input or output.

Although the plate thickness sensor 53 detects the plate thickness, a preset plate thickness may be input to the numerical controller 21. The material of the workpiece W may be directly input to the numerical controller 21 by a mode selection switch or the like. When only the thickness is detected, an optical material sensor for judging the material of the work W sandwiched by the work clamp 15 at the same time, for example, a steel plate or an aluminum plate, is provided in addition to the thickness sensor 53 of FIG. The input of the numerical controller 21 may be controlled.

The work W is carried in and supplied to the work tables 11 and 13 and is clamped by the work clamp 15 so that the carriage base 2
5, and by the control movement of the numerical controller 21 such as the carriage 27, the liquid is supplied between the lower turret 19 and the upper turret 17 at the punching processing position. The numerical controller 21 has a combination of dies P _{1 to} P ₃ , Q _{1 to} Q ₃ , R _{1 to} R _{3 and the} like having different clearances for the punches P, Q, and R depending on the material and the thickness of the work W. Be programmed.

Therefore, when the numerical controller 21 has a plate thickness input from a thickness sensor 53 at the time of pinching by the material input and the example workpiece clamping 15, setting the punch P, the optimum clearance for Q or R die P ₁ to P ₃ , Q _{1 to} Q ₃ , and R _{1 to} R ₃ are selectively controlled.

The selected punch P is moved to the punching center T by the rotation of the upper turret 17 by the servomotor M1.
And it is positioned by the shot pin cylinder 41. At the same time, the selected die P ₁ is indexed to the punching center T by the rotation of the lower turret 19 by the servo motor M ₂ , and the shot pin cylinder 51
Is positioned.

Thus the punch P which is positioned on the punching center T and is, by punching ruled striker 39, is pressed punch P is hit, between the die P ₁ of the lower turret 19, the workpiece W is in a predetermined shape Punched out.

Although the punches P, Q, and R have different shapes, the shapes may have the same size (diameter) but significantly different. Die
P _{1 to} P ₃ are in the range of the clearance according to the plate thickness, and have the same shape as the punch P. Dies Q _{1 to} Q ₃ are punch Q
, And dies R _{1 to} R ₃ are selected for the punch R.

The present invention is not limited to the above-described embodiment, but can be embodied in other modes by making appropriate changes.

〔The invention's effect〕

As can be understood from the above description of the embodiment, in short, the invention according to claim 1 includes an upper turret in which a punch is arranged, and a lower turret in which dies having the same shape as the punch and different clearances are arranged. A control device for selecting a punch, a die having an optimum clearance from the dies, a punch arranged on the upper turret and the lower turret according to a material and a plate thickness of a work to be processed, and a punch selected by the control device. A driving device for independently driving the upper turret and the lower turret for rotating and indexing the die to the punching position, and shifting the positions of the axis of the upper turret and the axis of the lower turret. The upper part of the upper surface of the lower turret is opened.

According to a second aspect of the present invention, in the first aspect of the present invention, there is provided a work clamp having a plate thickness sensor for detecting a plate thickness of the work.

As is apparent from the above configuration, in the invention according to claim 1, a plurality of dies having the same shape as the punch mounted on the upper turret and having different clearances are mounted on the lower turret, and the material and the thickness of the workpiece are different. A control device for selecting the punch and die that optimizes the clearance between the punch and die is provided, and the rotation of the upper and lower turrets can be controlled independently by this control device. It is easy to select the clearance between the punch and the die corresponding to the above.

In addition, since the upper turret and the lower turret are shifted in position from each other to open the upper position of a part of the upper surface of the lower turret, when the die is attached to or detached from the lower turret. In addition, the upper turret is not obstructed, and the die can be easily detached and replaced.

In the invention according to the second aspect, since the work clamp is provided with the plate thickness sensor, the work plate thickness can be easily detected.

[Brief description of the drawings]

1 shows an embodiment of the present invention. FIG. 1 is a front view of a turret punch press, FIG. 2 is a plan view in FIG. 1, and FIGS. 3 (A) and (B) are views in FIG. FIG. 4 is an enlarged plan view of the upper turret and the lower turret of the section viewed from the arrow III, and FIG. 4 is a side view of the clamp section of the section viewed from the arrow IV in FIG. 1 Turret punch press 15 Work clamp 17 Upper turret 19 Lower turret 21 Numerical control unit 29 Turret shaft 39 Striker 43 Turret shaft 53 Plate thickness sensor M ₁ … Servo motor M ₂ … Servo motor P, Q, R… Punch P _1- P ₃ , Q _1- Q ₃ , R _1- R ₃ … Die T… Punching center

Claims (2)

(57) [Claims] 1. An upper turret in which a punch is disposed, a lower turret in which dies having the same shape as the punch and different clearances are disposed, and the upper turret and the lower turret in accordance with the material and plate thickness of a work to be processed. A control device for selecting a punch and a die having an optimum clearance from the arranged punches and dies, and individually controlling the upper turret and the lower turret for turning and indexing the punch and the die selected by the control device to a punching processing position. And a drive device for independently driving, wherein a position of an axis of the upper turret and an axis of the lower turret are shifted to open a portion above an upper surface of the lower turret. And turret punch press. 2. A turret punch press according to claim 1, further comprising a work clamp having a plate thickness sensor for detecting a plate thickness of the work.